An adaptive scheme for estimating and correcting RF amplifiers’ non-linearities

An adaptive amplifier scheme is presented which allows for estimating and correcting the behaviour of a non-linear amplifier, in order to improve its performance for RF communication. This is attained configuring its operating mode in one of estimation of the amplifierpsilas non-linearity, automatic gain control, and correction of eye diagramspsila opening. The theory behind these three operating modes is explained first using simulation results obtained with a behavioural model. Experimental results, obtained with a proof-of-concept prototype, which validate the functional correctness in these three modes are also presented. Issues concerning implementation requirements and limitations are discussed.